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    Equilibrator for rapid and continuous detection of a gas in a liquid
    3.
    发明授权
    Equilibrator for rapid and continuous detection of a gas in a liquid 有权

    公开(公告)号：US11406947B2

    公开(公告)日：2022-08-09

    申请号：US15379905

    申请日：2016-12-15

    Applicant: U.S. Environmental Protection Agency

    Inventor： Christopher Ruybal ,  Dominic DiGiulio

    IPC: B01F25/312 ,  C02F1/44 ,  B01F23/23 ,  B01F23/237

    Abstract: A rapid and continuous separator or equilibrator to separate a gas from a liquid includes a venturi and injector, a mixer and a free overfall stream to separate a gas from a liquid. The injector introduces a carrier medium into the liquid which provides a reservoir for the gas to diffuse into as the liquid and carrier make a single transit through the apparatus. The separator was developed to enable real-time estimation of methane concentrations in ground water during purging. Real-time monitoring allows evaluation of trends during water well purging, spatial trends between water wells, and temporal comparisons between sampling events. These trends may be a result of removal of stored casing water, pre-purge ambient borehole flow, formation physical and chemical heterogeneity, or vertical flow outside of well casing due to poor bentonite or cement seals. Real-time information in the field can help focus an investigation, aid in determining when to collect a sample, save money by limiting costs (e.g. analytical, sample transport and storage), and provide an immediate assessment of local methane concentrations, Four domestic water wells, one municipal water well, and one agricultural water well were sampled for traditional laboratory analysis and compared to the field separator or equilibrator results. Applying a paired t-test comparing the new separator or equilibrator method and traditional laboratory analysis yielded a p-value 0.383, suggesting no significant difference between the two methods for the current study. Additional field and laboratory-based experimentation and potential modification of this device are necessary to justify use beyond screening at this time. However, early separator or equilibrator use suggests promising results and applications.

    PEPS—portable evaluation pilot skid
    7.
    发明授权
    PEPS—portable evaluation pilot skid 有权

    公开(公告)号：US09914654B2

    公开(公告)日：2018-03-13

    申请号：US14459277

    申请日：2014-08-13

    Applicant: U.S. ENVIRONMENTAL PROTECTION AGENCY

    Inventor： Daniel John Williams

    IPC: B01D33/70 ,  C02F1/74 ,  C02F1/00

    CPC classification number: C02F1/74 ,  C02F1/001 ,  C02F2201/008

    Abstract: In the drinking water industry, pilot plants have played a big role in assisting water professionals, utilities, and engineering firms in generating information about the behavior of large full scale systems. Due to the identification of new contaminants, stringent regulations, and demand for improved water quality the demand for novel water treatment challenges across North America have significantly increased. A portable evaluation pilot skid (PEPS) accommodates all water qualities. A vent valve screen is mounted inside the contactor with holes large enough to prevent clogging. Air is introduced into the contactor prior to the screen. The screen is mounted such that it breaks the air into small bubbles creating the effect of a stone diffusor. Air flow is easily adjusted with a needle valve.

    CHEMICAL INACTIVATION OF BACILLUS ANTHRACIS SPORES IN SOIL
    8.
    发明申请
    CHEMICAL INACTIVATION OF BACILLUS ANTHRACIS SPORES IN SOIL 审中-公开
    土壤中BACILLUS ANTHRACIS SPORES的化学灭活

    公开(公告)号：US20170064963A1

    公开(公告)日：2017-03-09

    申请号：US15271946

    申请日：2016-09-21

    Applicant: U.S. ENVIRONMENTAL PROTECTION AGENCY ,  BATTELLE MEMORIAL INSTITUTE

    Inventor： Joseph P. WOOD ,  Morgan Q.S. WENDLING ,  Andrew LASTIVKA

    IPC: A01N59/02 ,  A01N59/00

    CPC classification number: A01N59/02 ,  A01N59/00

    Abstract: A method of inactivating B antracis spores in a contaminated target environment by: exposing the environment containing said spores to an effective amount of persulfate in solution and an oxidation agent, and allowing the persulfate solution and oxidation agent to remain in contact with the environment containing said spores for sufficient time to inactivate the spores.

    Abstract translation: 一种在污染的目标环境中灭活B抗虫孢子的方法，其方法是将含有所述孢子的环境暴露于有效量的溶液和氧化剂中的过硫酸盐，并使过硫酸盐溶液和氧化剂与含有所述孢子的环境保持接触 孢子有足够的时间灭活孢子。

    Solid state amperometric chloramine sensor
    9.
    发明授权
    Solid state amperometric chloramine sensor 有权
    固态电流表氯胺传感器

    公开(公告)号：US09586814B2

    公开(公告)日：2017-03-07

    申请号：US13939959

    申请日：2013-07-11

    Applicant: The United States of America as Represented by the Administrator of the U.S. Environmental Protection Agency

    Inventor： Jonathan G. Pressman ,  Woo Hyoung Lee ,  David G. Wahman

    IPC: G01N27/26 ,  B81B1/00 ,  B81B7/02 ,  G01N27/404 ,  G01N33/18

    CPC classification number: B81B7/02 ,  G01N27/4045 ,  G01N33/188

    Abstract: A monochloramine microsensor includes an elongated housing defining a central axis and an open interior and having a capillary opening at one end. A semi-permeable membrane covers the capillary opening, the semi-permeable membrane allowing diffusion of chloramines there-through while preventing water from entering into the interior of the housing. A chloramine sensitive element in the form of a wire, fiber or nanotube is mounted within the housing, the chloramine sensitive element, when used in conjunction with an anode, outputs current in an amount proportional to the concentration of chloramine present in a liquid sample in which the chloramine sensitive element is immersed. The chloramine sensitive element extends along a length of the central axis to a first end adjacent to and spaced from the semi-permeable membrane. The chloramine sensitive element is a gold wire, a platinum wire, a carbon fiber or a carbon nanotube.

    Abstract translation: 一氯胺微传感器包括限定中心轴线和敞开内部并且在一端具有毛细管开口的细长壳体。 半透膜覆盖毛细管开口，半透膜允许氯胺在其中扩散，同时防止水进入壳体内部。 电线，纤维或纳米管形式的氯胺敏感元件安装在外壳内，氯胺敏感元件与阳极结合使用时，输出的电流量与液体样品中存在的氯胺浓度成比例 其中氯胺敏感元件被浸没。 氯胺敏感元件沿着中心轴的长度延伸到与半透膜相邻并与半透膜隔开的第一端。 氯胺敏感元件是金线，铂丝，碳纤维或碳纳米管。

    HOST-ASSOCIATED DNA SEQUENCES, PRIMERS, AND PROBES FOR PCR-BASED IDENTIFICATION OF DOG FECAL POLLUTION SOURCES
    10.
    发明申请
    HOST-ASSOCIATED DNA SEQUENCES, PRIMERS, AND PROBES FOR PCR-BASED IDENTIFICATION OF DOG FECAL POLLUTION SOURCES 有权
    HOST相关DNA序列，引物和探针，用于基于PCR的狗粪污染源鉴定

    公开(公告)号：US20150368695A1

    公开(公告)日：2015-12-24

    申请号：US14231296

    申请日：2014-03-31

    Applicant: U.S. ENVIRONMENTAL PROTECTION AGENCY

    Inventor： Orin C. SHANKS ,  Hyatt C. GREEN

    IPC: C12Q1/68

    CPC classification number: C12Q1/689

    Abstract: A method for detecting dog-fecal contamination in a sample, comprising assaying the sample using a nucleotide sequence based genetic assay which comprises contacting the sample with at least one nucleic acid molecule having the nucleic acid sequence shown in SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11, the nucleic acid sequence being capable of binding to a nucleic acid sequence in the sample, and detecting binding of the nucleic acid molecule to the nucleic acid sequence in the sample, wherein a presence of binding is indicative of the presence of dog-fecal contamination in the sample; the nucleic acid molecules; and a kit comprising at least two of the above-described nucleic acid molecules.

    Abstract translation: 一种用于检测样品中狗粪便污染的方法，包括使用基于核苷酸序列的遗传测定来测定样品，所述方法包括使所述样品与至少一种具有SEQ ID NO：1,2或2所示核酸序列的核酸分子接触， 3个，4个，5个，6个，7个，8个，9个，10个或11个，核酸序列能够结合样品中的核酸序列，并检测核酸分子与核酸序列的结合 样品，其中结合的存在指示样品中粪便粪便的存在; 核酸分子; 以及包含至少两个上述核酸分子的试剂盒。

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